Sorbothane Polyurethane Damping Material, 50 Durometer

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Sorbothane Polyurethane Damping Material, 50 Durometer
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Sorbothane® is a thermoset, polyether-based polyurethane viscoelastic material that combines high energy absorption with faultless memory. Sorbothane turns mechanical energy into heat. As the material is deformed, the friction created at the molecular level is generated into heat. High hysteresis is then formed. The energy is moved perpendicularly away from its original plane and is pushed close to 90° out of phase from its original disturbing force. Sorbothane is used in shock/vibration mounts, stud mounts, and grommets/bushings in diverse fields such as electronics/audio equipment, noise abatement, insoles, protective sports gear, and anti-vibration gloves and wraps. Information provided by Sorbothane Inc
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Physical Properties	Original Value	Comments

Density	1.30 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Shore OO	50
Tensile Strength, Ultimate	0.860 MPa	500 mm/min; ASTM D412 80
Tensile Stress at Strain	0.190 MPa @Strain 100 %	ASTM D412 80
Elongation at Break	500 %	500 mm/min; ASTM D412 80
100% Modulus	13.0 psi @Strain 100 %	ASTM D 412-06a
200% Modulus	24.0 psi @Strain 200 %	ASTM D 412-06a
300% Modulus	40.0 psi @Strain 300 %	ASTM D 412-06a
Compressive Yield Strength	0.610 MPa	50% strain; ASTM D575 Method A
	6.40 psi @Strain 20 %	ASTM D 575-91, Method A
Resilience	13.2	Lupke rebound test
Rebound	11 %	Resilience Rebound Height. ASTM D 2632-92. Modified for the effects of tackiness
Bulk Modulus	5.00 GPa
Coefficient of Friction	2.6	on polished steel; ASTM D1894
Coefficient of Friction, Static	10.4	on polished steel; ASTM D1894
Tear Strength Test	23.5	psi per ASTM 624 with 1 mm nick
Compression Set	6.2 % @Temperature 22.8 °C, Time 259000 sec	25% compression; ASTM D395

Thermal Properties	Original Value	Comments
CTE, linear	132 µm/m-°C @Temperature -50.0 - 100 °C
Thermal Conductivity	0.380 W/m-K	estimated from other durometer grades
Maximum Service Temperature, Air	<= 82.0 °C	Optimum performance range
Minimum Service Temperature, Air	>= -29.0 °C	optimum performance range
Glass Transition Temp, Tg	-43.0 °C
Flammability, UL94	V-2

Descriptive Properties
Bacterial Resistance	No Growth	ASTM G 22
Fungal Resistance	No Growth	ASTM G 21-09
Heat Aging	Stable	72 hours at 158°F

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